Replacing the coolant (Opel Kadett D)

Caution: If coolant is drained as part of a repair, it should be collected for future use. Do not drain coolant into the sewer, as it is toxic. Take it to special points.

Drain

Open the cap on the expansion tank.

Caution: When the engine is hot, put a thick cloth over it before opening the cap to avoid burns from hot coolant or steam. Remove the cap only when the coolant temperature is below +90°C.

Place a clean container under the radiator.



ONS engines. Disconnect the hose from the water pump and drain the coolant.

Remove the lower hose on the radiator and drain the coolant.



Diesel engine: Remove the drain plug from the exhaust pipe holder from the cylinder block and drain the coolant.

Caution: Since the coolant contains substances that prevent freezing and corrosion, it must be collected for reuse.

Refueling

Petrol engines: Place the hose on the water pump or radiator and secure with a clamp

Diesel engine. Insert the drain plug with sealant OPEL 1503166-90094714 into the cylinder block and tighten well.

Note: The cooling system must be filled with a mixture of water and antifreeze. Pay attention to the correct ratio of the mixture.

Fill the cooling system through the expansion tank.



Fill the coolant to a level 1 cm above the "cold" mark ("Kalt").

Engine ONS

To remove air, unscrew the temperature sensor near the manifold. If coolant is leaking from the sensor, screw it in and, if necessary, seal it with sealant (OPEL #15042000). Before doing this, clean the threads of the temperature sensor.

OHV engine

Fill the expansion tank with coolant to a level 1 cm above the "cold" mark, while removing air from the cylinder head at the heater hose branch. To do this, loosen the heater hose clamp (arrow) on the cylinder head until coolant comes out. Tighten the clamp.

(Source is on the website: OpelBook.ru)

Caution: It is not possible to remove air from the cooling system via the temperature sensor.

Diesel engine

There is no need to remove air from the system. Fill the coolant through the expansion tank.

Tighten the expansion tank cap until it stops.

Note: The coolant level when the cooling system is cold should be slightly above the "KALT" ("cold") mark. But when the engine is warm, the coolant level in the expansion tank rises, and when the engine cools down, it decreases again.

Start the engine and check all coolant hose connections for leaks.